Most disney burgers are "okay". Not great, but at the TS locations, usually not bad. I've had them at Sci Fi, Beaches & Cream, and maybe one other place that I can't think of. Honestly, after hearing how the B&C burger was the best thing on earth, I was anticipointed. I mean, it was fine, but not at all anything unusual. I thought the Sci Fi burger was comparable (and yes, it has gotten a bit better over the past several years.)
As for CS: the Angus burgers at Pecos Bill's seem to be a slight upgrade from the "standard Disney burger." The "standard Disney burger" at the other CS locations can be anywhere between pretty awful and adequate.
(I guess compared to the "standard Disney burger", the B&C burger really is very good. But, that's not a high bar.)